Improved drilling-machine



` VUNITED STATES` .PATENT 'OFFICE. s

"TRUMAN, P. ABASHFO'IRD, DECATUR, -MICHIGAN.

" IMPRovi-:nv MILLING-MACHINE.

Specflcationformng part. of Letters Patent No.. 52,515, dated Febrnary 27, 1866.

To all' whom 'it may concern:

I Be itknown that I'TRUMAN P. Bnsn'nonn, of Decatunvan Buren county, State of Michi` gan-,bave invented new and nsefulImpl-ovements in Machines vfor Drilling Metal Plates;

y and I do hereby declare the following to 4 be an e'xact description thereof, reference being had to ,the accompanying drawings, and .to the letters of reference marked -tlxereon,-m akin g a part of this specification. l

lhe nature of my invention consists in tlie arrangement and combination ofthe two drills driven by a belt and engine or bya crank and' cog-gearing While tl'ieyitravel back and forth on a. movable frame-operated by a treadle and weight.

A represents the frame or tableth at supports the operznsing devices-5 -B B, the steel drills resting horizontally on` posts D D, mortised permanently to the movable platform. E. The

drills B are operated by the crank F or belt G of the driving-shaft H. The movable platyform Eis drawn forward by the ropes I attachedto'tlie treadlel, and moved backward by the weight K.

The plate to be bored or 'drilled 'is'plaeedagainst the upright post L, and the machine TRUMAN P.- BAsHFoRD.

Witnesses:

J. FRANKLIN REIGARfr, t HENRY H. THOMAS. 

